| 1 | #!/bin/bash |
| 2 | # |
| 3 | # Test lseek influence on qcow2 block-status |
| 4 | # |
| 5 | # Block layer may recursively check block_status in file child of qcow2, if |
| 6 | # qcow2 driver returned DATA. There are several test cases to check influence |
| 7 | # of lseek on block_status performance. To see real difference run on tmpfs. |
| 8 | # |
| 9 | # Copyright (c) 2019 Virtuozzo International GmbH. All rights reserved. |
| 10 | # |
| 11 | # Tests originally written by Kevin Wolf |
| 12 | # |
| 13 | # This program is free software; you can redistribute it and/or modify |
| 14 | # it under the terms of the GNU General Public License as published by |
| 15 | # the Free Software Foundation; either version 2 of the License, or |
| 16 | # (at your option) any later version. |
| 17 | # |
| 18 | # This program is distributed in the hope that it will be useful, |
| 19 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | # GNU General Public License for more details. |
| 22 | # |
| 23 | # You should have received a copy of the GNU General Public License |
| 24 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 25 | # |
| 26 | |
| 27 | if [ "$#" -lt 1 ]; then |
| 28 | echo "Usage: $0 SOURCE_FILE" |
| 29 | exit 1 |
| 30 | fi |
| 31 | |
| 32 | ROOT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../../../.." >/dev/null 2>&1 && pwd )" |
| 33 | QEMU_IMG="$ROOT_DIR/qemu-img" |
| 34 | QEMU_IO="$ROOT_DIR/qemu-io" |
| 35 | |
| 36 | size=1G |
| 37 | src="$1" |
| 38 | |
| 39 | # test-case plain |
| 40 | |
| 41 | ( |
| 42 | $QEMU_IMG create -f qcow2 "$src" $size |
| 43 | for i in $(seq 16384 -1 0); do |
| 44 | echo "write $((i * 65536)) 64k" |
| 45 | done | $QEMU_IO "$src" |
| 46 | ) > /dev/null |
| 47 | |
| 48 | echo -n "plain: " |
| 49 | /usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// |
| 50 | |
| 51 | # test-case forward |
| 52 | |
| 53 | ( |
| 54 | $QEMU_IMG create -f qcow2 "$src" $size |
| 55 | for i in $(seq 0 2 16384); do |
| 56 | echo "write $((i * 65536)) 64k" |
| 57 | done | $QEMU_IO "$src" |
| 58 | for i in $(seq 1 2 16384); do |
| 59 | echo "write $((i * 65536)) 64k" |
| 60 | done | $QEMU_IO "$src" |
| 61 | ) > /dev/null |
| 62 | |
| 63 | echo -n "forward: " |
| 64 | /usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// |
| 65 | |
| 66 | # test-case prealloc |
| 67 | |
| 68 | $QEMU_IMG create -f qcow2 -o preallocation=metadata "$src" $size > /dev/null |
| 69 | |
| 70 | echo -n "prealloc: " |
| 71 | /usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// |